【作者】 刘军； 仇海亮； 余东晓； 赵长冰； 胡文； 于刚；

【Author】 Liujun~(1,2),Qiu Ha-iling~(1,2),Yu Dong-xiao~3,Zhao Chang-bing~(1,2),Hu Wen~(1,2),Yu Gang~(1,2) (1.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098;2.Geotechnical Research Institute,Hohai University,Nanjing 210098;3.Wu Longquan Mine,Mining Co.LTD of Wuhan Iron and Steel Group,Wuhan 430213)

【机构】 岩土力学与堤坝工程教育部重点实验室； 河海大学岩土工程科学研究所； 武汉钢铁集团矿业有限责任公司乌龙泉矿；

【摘要】 提出了离散元框架内的网格实体模型,开发了计算程序DEM-SLM,把介质用颗粒单元(圆盘单元)离散化,在相邻颗粒间添加"梁",这样研究对象就成为一个由颗粒单元与"梁"网络形成的复合结构。"梁"的作用是使颗粒的集合体具有与初始对象近似的强度性质。用离散元法描述颗粒单元的运动,并通过相邻颗粒间的相对位移计算"梁"的变形,根据"梁"的强度准则判别"梁"是否存在;然后采用矩阵位移法计算"梁"的受力,并反作用于对应的颗粒单元上。DEM-SLM模型非常适合模拟不同尺度不连续面对岩体材料变形的影响。最后对三峡永久船闸高边坡开挖卸荷变形进行了模拟,模拟结果与实测结果吻合较好。更多还原

【Abstract】 The Solid lattice Model in the frame of Discrete Element Method(DEM-SLM) has been put out and the corresponding code developed.The media has been discretized by disc elements,and the elements in contacts were connected by beams.So,the media was simplified into compound structure which composed of particles and beams.The collect of particles had the similar strength to the initial media because of the effects of beams.The DEM had been employed to simulated movements of particles,and the deformations of beams were calculated by the relative displacements between particles in contacts.A strength law of beams was used to verify whether a deformed beam existed.The matrix-displacement method was used to calculate forces of beams,and the forces of beams were exerted on particles as opposite forces.The DEM-SLM is very suitable to simulate deformation of rock materials with discontinuity surfaces of different scale.The DEM-SLM is used to simulate high slope unloading deformation of permanent shiplock of Three Gorges.The simulated results are approximately coincident with those of measurement.更多还原